package com.kexio.enterprise.integration;

import com.kexio.enterprise.integration.event.EventService;
import com.kexio.enterprise.integration.event.domain.Event;
import com.kexio.enterprise.integration.event.enums.EventPriority;
import com.kexio.enterprise.integration.event.enums.EventStatus;
import com.kexio.enterprise.integration.event.listener.EventListener;
import com.kexio.enterprise.integration.event.result.EventPublishResult;
import com.kexio.enterprise.integration.event.schedule.EventScheduleResult;
import com.kexio.enterprise.integration.event.statistics.EventStatistics;
import com.kexio.enterprise.integration.event.query.EventQueryCriteria;
import com.kexio.enterprise.integration.event.condition.EventCondition;
import com.kexio.enterprise.integration.event.result.EventReplayResult;
import com.kexio.enterprise.integration.event.filter.EventFilter;
import com.kexio.enterprise.integration.event.handler.EventHandler;
import com.kexio.enterprise.integration.event.history.EventHistory;
import com.kexio.enterprise.integration.event.result.EventHandleResult;
import com.kexio.enterprise.integration.event.status.EventProcessingStatus;
import com.kexio.enterprise.integration.event.status.HandlerStatus;
import com.kexio.enterprise.integration.file.FileService;
import com.kexio.enterprise.integration.file.domain.FileInfo;
import com.kexio.enterprise.integration.file.metadata.FileMetadata;
import com.kexio.enterprise.integration.file.query.FileSearchCriteria;
import com.kexio.enterprise.integration.file.result.FileDownloadResult;
import com.kexio.enterprise.integration.file.result.FileUploadResult;
import com.kexio.enterprise.integration.file.statistics.StorageStatistics;
import com.kexio.enterprise.integration.file.impl.LocalFileService;
import com.kexio.enterprise.integration.common.PageResult;
import com.kexio.enterprise.integration.message.MessageService;
import com.kexio.enterprise.integration.message.domain.Message;
import com.kexio.enterprise.integration.message.enums.MessageStatus;
import com.kexio.enterprise.integration.message.enums.MessageType;
import com.kexio.enterprise.integration.message.enums.MessagePriority;
import com.kexio.enterprise.integration.message.history.MessageHistory;
import com.kexio.enterprise.integration.message.query.MessageQueryCriteria;
import com.kexio.enterprise.integration.message.result.MessageSendResult;
import com.kexio.enterprise.integration.message.schedule.MessageScheduleResult;
import com.kexio.enterprise.integration.message.statistics.MessageStatistics;
import com.kexio.enterprise.integration.message.template.MessageTemplate;
import com.kexio.enterprise.integration.message.template.TemplateMessage;
import com.kexio.enterprise.integration.notification.NotificationService;
import com.kexio.enterprise.integration.notification.domain.Notification;
import com.kexio.enterprise.integration.notification.domain.UserNotification;
import com.kexio.enterprise.integration.notification.enums.NotificationChannel;
import com.kexio.enterprise.integration.notification.enums.NotificationPriority;
import com.kexio.enterprise.integration.notification.enums.NotificationStatus;
import com.kexio.enterprise.integration.notification.enums.NotificationType;
import com.kexio.enterprise.integration.notification.preferences.NotificationPreferences;
import com.kexio.enterprise.integration.notification.query.NotificationSearchCriteria;
import com.kexio.enterprise.integration.notification.result.NotificationResult;
import com.kexio.enterprise.integration.notification.schedule.NotificationScheduleResult;
import com.kexio.enterprise.integration.notification.statistics.NotificationStatistics;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.context.ApplicationEventPublisher;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.scheduling.annotation.EnableAsync;

import jakarta.annotation.PostConstruct;
import java.time.LocalDateTime;
import java.util.List;
import java.util.Map;
import java.util.concurrent.CompletableFuture;

/**
 * 集成服务模块自动配置
 * 
 * 功能说明：
 * - 文件存储服务：本地、MinIO、S3
 * - 消息服务：邮件、短信、推送
 * - 通知服务：站内通知、多渠道推送
 * - 事件服务：事件发布订阅、异步处理
 * 
 * @author Kexio
 * @since 1.0.0
 */
@Configuration
@EnableAsync
@ConditionalOnProperty(name = "kexio.enterprise.integration.enabled", havingValue = "true", matchIfMissing = true)
public class IntegrationAutoConfiguration {

    private static final Logger log = LoggerFactory.getLogger(IntegrationAutoConfiguration.class);

    @PostConstruct
    public void init() {
        log.info("==> Kexio集成服务模块已启用");
        log.debug("集成服务模块包含: 文件存储、消息服务、通知服务、事件服务");
    }

    /**
     * 文件存储服务
     */
    @Bean
    @ConditionalOnMissingBean
    @ConditionalOnProperty(name = "kexio.enterprise.integration.file.enabled", havingValue = "true", matchIfMissing = true)
    public FileService fileService() {
        log.debug("==> 创建LocalFileService实例");
        // 默认配置，实际应该从配置文件读取
        String basePath = System.getProperty("java.io.tmpdir") + "/kexio-files";
        String baseUrl = "http://localhost:8080/files";
        return new LocalFileService(basePath, baseUrl);
    }

    /**
     * 消息服务（条件性创建）
     */
    @Bean
    @ConditionalOnMissingBean
    @ConditionalOnProperty(name = "kexio.enterprise.integration.message.enabled", havingValue = "true", matchIfMissing = true)
    public MessageService messageService() {
        log.debug("==> 创建MessageService实例");
        return new DefaultMessageService();
    }

    /**
     * 通知服务（条件性创建）
     */
    @Bean
    @ConditionalOnMissingBean
    @ConditionalOnProperty(name = "kexio.enterprise.integration.notification.enabled", havingValue = "true", matchIfMissing = true)
    public NotificationService notificationService(MessageService messageService) {
        log.debug("==> 创建NotificationService实例");
        return new DefaultNotificationService(messageService);
    }

    /**
     * 事件服务
     */
    @Bean
    @ConditionalOnMissingBean
    @ConditionalOnProperty(name = "kexio.enterprise.integration.event.enabled", havingValue = "true", matchIfMissing = true)
    public EventService eventService(ApplicationEventPublisher eventPublisher) {
        log.debug("==> 创建EventService实例");
        return new DefaultEventService(eventPublisher);
    }

    /**
     * 默认消息服务实现（简化版）
     */
    private static class DefaultMessageService implements MessageService {
        private static final Logger log = LoggerFactory.getLogger(DefaultMessageService.class);

        @Override
        public MessageSendResult sendMessage(Message message) {
            MessageSendResult result = new MessageSendResult();
            result.setSuccess(true);
            result.setMessageId(message.getMessageId());
            result.setStatus(MessageStatus.SENT);
            result.setSendTime(LocalDateTime.now());
            log.debug("消息发送模拟: {} to {}", message.getSubject(), message.getRecipients());
            return result;
        }

        @Override
        public List<MessageSendResult> batchSendMessages(List<Message> messages) {
            return messages.stream().map(this::sendMessage).collect(java.util.stream.Collectors.toList());
        }

        @Override
        public void sendMessageAsync(Message message) {
            CompletableFuture.runAsync(() -> sendMessage(message));
        }

        @Override
        public void batchSendMessagesAsync(List<Message> messages) {
            CompletableFuture.runAsync(() -> batchSendMessages(messages));
        }

        @Override
        public MessageSendResult sendTemplateMessage(TemplateMessage templateMessage) {
            MessageSendResult result = new MessageSendResult();
            result.setSuccess(true);
            result.setMessageId(java.util.UUID.randomUUID().toString());
            result.setStatus(MessageStatus.SENT);
            result.setSendTime(LocalDateTime.now());
            log.debug("模板消息发送模拟: template {} to {}", templateMessage.getTemplateId(), templateMessage.getRecipients());
            return result;
        }

        @Override
        public MessageScheduleResult scheduleMessage(Message message, LocalDateTime sendTime) {
            MessageScheduleResult result = new MessageScheduleResult();
            result.setScheduled(true);
            result.setScheduleId(java.util.UUID.randomUUID().toString());
            result.setMessageId(message.getMessageId());
            result.setScheduleTime(sendTime);
            log.debug("消息调度模拟: {} at {}", message.getSubject(), sendTime);
            return result;
        }

        @Override
        public boolean cancelScheduledMessage(String scheduleId) {
            log.debug("取消调度消息模拟: {}", scheduleId);
            return true;
        }

        @Override
        public MessageStatus getMessageStatus(String messageId) {
            return MessageStatus.SENT;
        }

        @Override
        public List<MessageHistory> queryMessageHistory(MessageQueryCriteria criteria) {
            return java.util.Collections.emptyList();
        }

        @Override
        public MessageStatistics getMessageStatistics(LocalDateTime startTime, LocalDateTime endTime) {
            return new MessageStatistics();
        }

        @Override
        public void registerTemplate(MessageTemplate template) {
            log.debug("注册消息模板模拟: {}", template.getTemplateId());
        }

        @Override
        public MessageTemplate getTemplate(String templateId) {
            MessageTemplate template = new MessageTemplate();
            template.setTemplateId(templateId);
            template.setTemplateName("模板示例");
            return template;
        }

        @Override
        public void updateTemplate(MessageTemplate template) {
            log.debug("更新消息模板模拟: {}", template.getTemplateId());
        }

        @Override
        public void deleteTemplate(String templateId) {
            log.debug("删除消息模板模拟: {}", templateId);
        }

        @Override
        public List<MessageTemplate> getAllTemplates() {
            return java.util.Collections.emptyList();
        }

        @Override
        public MessageSendResult retryMessage(String messageId) {
            MessageSendResult result = new MessageSendResult(true, messageId);
            log.debug("重试消息模拟: {}", messageId);
            return result;
        }

        @Override
        public List<MessageSendResult> batchRetryMessages(List<String> messageIds) {
            return messageIds.stream()
                .map(this::retryMessage)
                .collect(java.util.stream.Collectors.toList());
        }

        @Override
        public int cleanupMessageHistory(LocalDateTime beforeTime) {
            log.debug("清理消息历史模拟: before {}", beforeTime);
            return 0;
        }
    }

    /**
     * 默认通知服务实现（简化版）
     */
    private static class DefaultNotificationService implements NotificationService {
        private static final Logger log = LoggerFactory.getLogger(DefaultNotificationService.class);
        private final MessageService messageService;

        public DefaultNotificationService(MessageService messageService) {
            this.messageService = messageService;
        }

        @Override
        public NotificationResult sendNotification(Notification notification) {
            NotificationResult result = new NotificationResult();
            result.setSuccess(true);
            result.setNotificationId(notification.getNotificationId());
            result.setSendTime(LocalDateTime.now());
            log.debug("通知发送模拟: {} to {}", notification.getTitle(), notification.getRecipients());
            return result;
        }

        @Override
        public List<NotificationResult> batchSendNotifications(List<Notification> notifications) {
            return notifications.stream().map(this::sendNotification).collect(java.util.stream.Collectors.toList());
        }

        @Override
        public void sendNotificationAsync(Notification notification) {
            CompletableFuture.runAsync(() -> sendNotification(notification));
        }

        @Override
        public NotificationResult broadcastNotification(Notification notification, String userGroup) {
            log.debug("广播通知模拟: {} to group {}", notification.getTitle(), userGroup);
            return sendNotification(notification);
        }

        @Override
        public NotificationResult sendPersonalizedNotification(String templateId, Long userId, Map<String, Object> variables) {
            log.debug("个性化通知模拟: template {} to user {}", templateId, userId);
            NotificationResult result = new NotificationResult();
            result.setSuccess(true);
            result.setNotificationId(java.util.UUID.randomUUID().toString());
            result.setSendTime(LocalDateTime.now());
            return result;
        }

        @Override
        public NotificationScheduleResult scheduleNotification(Notification notification, LocalDateTime sendTime) {
            NotificationScheduleResult result = new NotificationScheduleResult();
            result.setScheduled(true);
            result.setScheduleId(java.util.UUID.randomUUID().toString());
            result.setNotificationId(notification.getNotificationId());
            result.setScheduleTime(sendTime);
            log.debug("通知调度模拟: {} at {}", notification.getTitle(), sendTime);
            return result;
        }

        @Override
        public boolean cancelScheduledNotification(String scheduleId) {
            log.debug("取消调度通知模拟: {}", scheduleId);
            return true;
        }

        @Override
        public boolean markAsRead(String notificationId, Long userId) {
            log.debug("标记已读模拟: {} for user {}", notificationId, userId);
            return true;
        }

        @Override
        public int batchMarkAsRead(List<String> notificationIds, Long userId) {
            log.debug("批量标记已读模拟: {} items for user {}", notificationIds.size(), userId);
            return notificationIds.size();
        }

        @Override
        public boolean deleteNotification(String notificationId, Long userId) {
            log.debug("删除通知模拟: {} for user {}", notificationId, userId);
            return true;
        }

        @Override
        public int batchDeleteNotifications(List<String> notificationIds, Long userId) {
            log.debug("批量删除通知模拟: {} items for user {}", notificationIds.size(), userId);
            return notificationIds.size();
        }

        @Override
        public List<UserNotification> getUserNotifications(Long userId, NotificationSearchCriteria criteria) {
            return java.util.Collections.emptyList();
        }

        @Override
        public long getUnreadCount(Long userId) {
            return 0;
        }

        @Override
        public NotificationStatistics getUserNotificationStatistics(Long userId, LocalDateTime startTime, LocalDateTime endTime) {
            return new NotificationStatistics();
        }

        @Override
        public NotificationStatistics getSystemNotificationStatistics(LocalDateTime startTime, LocalDateTime endTime) {
            return new NotificationStatistics();
        }

        @Override
        public void setUserPreferences(NotificationPreferences preferences) {
            log.debug("设置用户偏好模拟: user {}", preferences.getUserId());
        }

        @Override
        public NotificationPreferences getUserPreferences(Long userId) {
            NotificationPreferences preferences = new NotificationPreferences();
            preferences.setUserId(userId);
            return preferences;
        }

        @Override
        public int cleanupExpiredNotifications(LocalDateTime beforeTime) {
            log.debug("清理过期通知模拟: before {}", beforeTime);
            return 0;
        }

        @Override
        public NotificationResult resendNotification(String notificationId) {
            NotificationResult result = new NotificationResult(true, notificationId);
            log.debug("重发通知模拟: {}", notificationId);
            return result;
        }

        @Override
        public List<NotificationResult> batchResendNotifications(List<String> notificationIds) {
            return notificationIds.stream()
                .map(this::resendNotification)
                .collect(java.util.stream.Collectors.toList());
        }

        // DefaultNotificationService 实现完成
    }

    /**
     * 默认事件服务实现（简化版）
     */
    private static class DefaultEventService implements EventService {
        private static final Logger log = LoggerFactory.getLogger(DefaultEventService.class);
        private final ApplicationEventPublisher eventPublisher;

        public DefaultEventService(ApplicationEventPublisher eventPublisher) {
            this.eventPublisher = eventPublisher;
        }

        @Override
        public EventPublishResult publishEvent(Event event) {
            EventPublishResult result = new EventPublishResult();
            result.setSuccess(true);
            result.setEventId(event.getEventId());
            result.setStatus(EventStatus.PROCESSED);
            result.setPublishTime(LocalDateTime.now());
            
            // 发布到Spring事件系统
            eventPublisher.publishEvent(event);
            
            log.debug("事件发布模拟: {} type {}", event.getEventId(), event.getEventType());
            return result;
        }

        @Override
        public CompletableFuture<EventPublishResult> publishEventAsync(Event event) {
            return CompletableFuture.supplyAsync(() -> publishEvent(event));
        }

        @Override
        public List<EventPublishResult> batchPublishEvents(List<Event> events) {
            return events.stream().map(this::publishEvent).collect(java.util.stream.Collectors.toList());
        }

        @Override
        public EventPublishResult publishToTopic(String topic, Event event) {
            event.setTopic(topic);
            return publishEvent(event);
        }

        @Override
        public EventPublishResult publishConditionalEvent(Event event, EventCondition condition) {
            if (condition.evaluate(event)) {
                return publishEvent(event);
            } else {
                EventPublishResult result = new EventPublishResult();
                result.setSuccess(false);
                result.setEventId(event.getEventId());
                result.setStatus(EventStatus.CANCELLED);
                result.setErrorMessage("条件不满足");
                return result;
            }
        }

        @Override
        public EventPublishResult publishDelayedEvent(Event event, long delayTime) {
            // 简化实现，实际应该使用调度器
            CompletableFuture.delayedExecutor(delayTime, java.util.concurrent.TimeUnit.MILLISECONDS)
                            .execute(() -> publishEvent(event));
            
            EventPublishResult result = new EventPublishResult();
            result.setSuccess(true);
            result.setEventId(event.getEventId());
            result.setStatus(EventStatus.PENDING);
            result.setPublishTime(LocalDateTime.now());
            log.debug("延迟事件发布模拟: {} delay {}ms", event.getEventId(), delayTime);
            return result;
        }

        @Override
        public EventScheduleResult scheduleEvent(Event event, LocalDateTime scheduleTime) {
            EventScheduleResult result = new EventScheduleResult();
            result.setScheduled(true);
            result.setScheduleId(java.util.UUID.randomUUID().toString());
            result.setEventId(event.getEventId());
            result.setScheduleTime(scheduleTime);
            log.debug("事件调度模拟: {} at {}", event.getEventId(), scheduleTime);
            return result;
        }

        @Override
        public boolean cancelScheduledEvent(String scheduleId) {
            log.debug("取消调度事件模拟: {}", scheduleId);
            return true;
        }

        @Override
        public void subscribeEventType(String eventType, EventListener listener) {
            log.debug("订阅事件类型模拟: {}", eventType);
        }

        @Override
        public void subscribeTopic(String topic, EventListener listener) {
            log.debug("订阅主题模拟: {}", topic);
        }

        @Override
        public void unsubscribeEventType(String eventType, EventListener listener) {
            log.debug("取消订阅事件类型模拟: {}", eventType);
        }

        @Override
        public void unsubscribeTopic(String topic, EventListener listener) {
            log.debug("取消订阅主题模拟: {}", topic);
        }

        @Override
        public EventPublishResult replayEvent(String eventId) {
            EventPublishResult result = new EventPublishResult(true, eventId);
            //简化实现
            log.debug("事件重放模拟: {}", eventId);
            return result;
        }

        @Override
        public List<EventPublishResult> batchReplayEvents(List<String> eventIds) {
            return eventIds.stream().map(this::replayEvent).collect(java.util.stream.Collectors.toList());
        }

        @Override
        public List<Event> queryEvents(EventQueryCriteria criteria) {
            return java.util.Collections.emptyList();
        }

        @Override
        public EventStatistics getEventStatistics(String eventType) {
            return new EventStatistics();
        }

        @Override
        public Map<String, EventStatistics> getAllEventStatistics() {
            return java.util.Collections.emptyMap();
        }

        @Override
        public void clearEventStatistics(String eventType) {
            log.debug("清空事件统计模拟: {}", eventType);
        }

        @Override
        public int getActiveListenerCount(String eventType) {
            return 0;
        }

        @Override
        public boolean hasListener(String eventType) {
            return false;
        }

        @Override
        public void subscribeWithFilter(String eventType, EventFilter filter, EventListener listener) {
            log.debug("订阅事件（带过滤器）模拟: {}", eventType);
        }

        @Override
        public void registerEventHandler(String eventType, EventHandler handler) {
            log.debug("注册事件处理器模拟: {}", eventType);
        }

        @Override
        public void unregisterEventHandler(String eventType, EventHandler handler) {
            log.debug("注销事件处理器模拟: {}", eventType);
        }

        @Override
        public List<EventReplayResult> batchReplayEventsWithDetail(List<String> eventIds) {
            return eventIds.stream()
                .map(id -> new EventReplayResult(true, id))
                .collect(java.util.stream.Collectors.toList());
        }

        @Override
        public List<EventHistory> queryEventHistory(EventQueryCriteria criteria) {
            return java.util.Collections.emptyList();
        }

        @Override
        public EventProcessingStatus getEventProcessingStatus(String eventId) {
            EventProcessingStatus status = new EventProcessingStatus();
            status.setEventId(eventId);
            status.setStatus(EventStatus.PROCESSED);
            status.setTotalHandlers(1);
            status.setCompletedHandlers(1);
            status.setFailedHandlers(0);
            return status;
        }

        @Override
        public void setEventProcessingEnabled(boolean enabled) {
            log.debug("设置事件处理状态模拟: {}", enabled);
        }

        @Override
        public int cleanupEventHistory(LocalDateTime beforeTime) {
            log.debug("清理事件历史模拟: before {}", beforeTime);
            return 0;
        }

        @Override
        public List<EventHandleResult> getEventHandleResults(String eventId) {
            return java.util.Collections.emptyList();
        }
    }
}
